X-ray-activated luminescence materials have broad application prospects in photodynamic therapy of deep tissue. Among them, X-ray-activated persistent luminescence materials (PLMs) exhibiting multiple emission peaks have drawn extensive attention for their capacity to achieve a combination of bioimaging and therapeutic functions. Here, we developed a novel PLM, LiYGeO:Bi,Pr, that simultaneously exhibits UV and NIR dual persistent luminescence (PersL) emissions after irradiation by X-ray. The material can be repeatedly excited by X-ray and emits similar luminescence intensity every time, which shows good PersL stability. In addition, LiYGeO:Bi,Pr exhibits photostimulated PersL properties by stimulation with a red light-emitting diode (LED) or NIR laser after long-term decay. This work provides a new choice of X-ray-excited PLMs with UV and NIR dual emission and the novel phosphor shows promise as a potential candidate for the integration of treatment and diagnosis of deep tumors.

中文翻译：

---

X射线激活Bi3+/Pr3+共掺杂LiYGeO4荧光粉，具有紫外和近红外双发射持久发光功能

X射线激活发光材料在深部组织光动力治疗中具有广阔的应用前景。其中，具有多个发射峰的X射线激活持久发光材料（PLM）因其实现生物成像和治疗功能相结合的能力而受到广泛关注。在这里，我们开发了一种新型 PLM，LiYGeO:Bi,Pr，它在 X 射线照射后同时表现出紫外和近红外双余辉发光 (PersL) 发射。该材料可以被X射线反复激发，每次发出相似的发光强度，表现出良好的PersL稳定性。此外，LiYGeO:Bi,Pr 在长期衰减后，通过红色发光二极管 (LED) 或近红外激光的刺激，表现出光刺激 PersL 特性。这项工作为具有紫外和近红外双发射的 X 射线激发 PLM 提供了新的选择，并且这种新型荧光粉有望成为深度肿瘤治疗和诊断一体化的潜在候选者。